Electrochemical lithium ion intercalation in Li 0.5Ni 0.25TiOPO 4 examined by in situ X-ray diffraction
2012 (English)In: Solid State Ionics, ISSN 0167-2738, E-ISSN 1872-7689, Vol. 225, no SI, 547-550 p.Article in journal, Meeting abstract (Refereed) Published
The complex structural transformations of Li 0.5Ni 0.25TiOPO 4 during electrochemical lithiation have been examined by in situ X-ray diffraction. During the first lithiation two structural changes take place: first a transition to a second monoclinic phase (a = 9.085(4), b = 8.414(5), c = 6.886(5), β = 99.85(4)) and secondly a transition to a third phase with limited long-range order. The third phase is held together by a network of corner sharing Ti-O octahedra and phosphate ions with disordered Ni-Li channels. During delithiation the third phase is partially transformed back to a slightly disordered original phase, Li 0.5Ni 0.25TiOPO 4 without formation of the second intermediate phase. These phase transitions correspond well to the different voltage plateaus that this material shows during electrochemical cycling.
Place, publisher, year, edition, pages
2012. Vol. 225, no SI, 547-550 p.
Batteries, In situ X-ray powder diffraction, Lithium intercalation compounds, Corner sharing, De-lithiation, Electrochemical cycling, Electrochemical lithiation, In-situ, Intermediate phase, Lithiation, Lithium Intercalation, Lithium ions, Long range orders, Monoclinic phase, Phosphate ions, Structural change, Structural transformation, Third phase, Solar cells, X ray diffraction, X ray powder diffraction, Lithium
Natural Sciences Inorganic Chemistry
Research subject Chemistry with specialization in Inorganic Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-186837DOI: 10.1016/j.ssi.2011.11.001ISI: 000311873400113OAI: oai:DiVA.org:uu-186837DiVA: diva2:574845
18th International Conference on Solid State Ionics, July 3 -8, 2011, Warsaw, Poland